Terry Gross

In his latest book, Pakistan on the Brink, journalist Ahmed Rashid writes that he fears Pakistan is on the verge of a "meltdown." Rashid explains some of the challenges facing the country, as well as the complicated relationship both Pakistan and Afghanistan have with the United States.

Science writer Dick Teresi and transplant surgeon Richard Freeman discuss the ethics of transplant surgery and how doctors determine the point between life and death.

For five seasons, actress Sonja Sohn played Detective Shakima "Kima" Greggs on the critically acclaimed HBO series The Wire, which chronicled life — and death — on Baltimore's toughest streets. When the series ended, Sohn stayed in Baltimore -- to help young people straighten out their lives.